Search found 13 matches

by dentistguba
Sat Jun 14, 2014 4:56 pm
Forum: DSP
Topic: Dispersion Filter
Replies: 7
Views: 31813

Re: Dispersion Filter

I just checked again and it seems the issue is really that the allpass gain lags behind the phase input by a small amount which gets larger as it increases, this means that the correction is right for the given phase shift but overcompensates for the actual result - cutting into the constant one ...
by dentistguba
Sat Jun 14, 2014 3:57 pm
Forum: DSP
Topic: Dispersion Filter
Replies: 7
Views: 31813

Re: Dispersion Filter

I beleive the 'X1' there is 'prevIn' with this form which swaps the usual middle delay with the multiplies in the comb parts making a one multiply, two buffer version.

There is sort of an extra delay though as you can see from the wave display when the pure delay time out of the divide is connected ...
by dentistguba
Sat Jun 14, 2014 2:19 am
Forum: DSP
Topic: Dispersion Filter
Replies: 7
Views: 31813

Re: Dispersion Filter

My problem may actually be due to the delay modulation really as i guess reading out a sample more than once could create extra energy, for stretching out a bunch of samples the level would have to be scaled down so they add up to the same value as before. Just odd that the allpass seems to be the ...
by dentistguba
Fri Jun 13, 2014 12:34 pm
Forum: DSP
Topic: Dispersion Filter
Replies: 7
Views: 31813

Re: Dispersion Filter

That's pretty cool, is that using bandpass shaped group delay or just standard 2nd order continuous low-high/high-low phase delay curve? read a paper that used the former for a similar purpose.

I have been doing physical modelling similar to KG but haven't quite got to the stage where more accurate ...
by dentistguba
Fri Jun 06, 2014 5:20 pm
Forum: General
Topic: automation for a vst plug in
Replies: 2
Views: 7466

Re: automation for a vst plug in

Is there a preset manager in there?

my first guess would be that is missing as it is required to allow host automation, caught me out a few times. If you don't have one then put one in (search the default modules) and save-reload the schematic and it should work.
by dentistguba
Fri May 02, 2014 12:13 am
Forum: DSP
Topic: I need delay with high precision interpolation
Replies: 4
Views: 19851

Re: I need delay with high precision interpolation

yeah the allpass is often fine, I've been making nonlinear cymbal waveguides though which are pretty unstable with all the modulation so I've started looking beyond that. modelling a whole string with all delays replaced with series allpass interpolators worked pretty well but with predictably ...
by dentistguba
Fri May 02, 2014 12:00 am
Forum: DSP
Topic: Audio buffer lookahead?
Replies: 3
Views: 16128

Re: Audio buffer lookahead?

It did seem that way but best to check.

I was interested when I saw the ruby DLL thing but as you said i'm going for realtime. The idea is to have individual drums as mini vst effects each on their own mixer channel in a host and trigger internally from a sensor (e.g piezo) connected to any ADC ...
by dentistguba
Thu May 01, 2014 7:20 pm
Forum: DSP
Topic: Pith Bend and Modulation
Replies: 1
Views: 11538

Re: Pith Bend and Modulation

Is that in a particular host?

I have had a bit of trouble with the FL studio version as it seems that it doesn't send midi pitchbend by default and instead seems to modulate the actual frequency value.

may be some fix for that but I just remapped the wheel on my keyboard to my own parameter ...
by dentistguba
Thu May 01, 2014 7:03 pm
Forum: DSP
Topic: I need delay with high precision interpolation
Replies: 4
Views: 19851

Re: I need delay with high precision interpolation

There was a pack of interpolators with visual graphs for synthmaker which should work in flowstone too here:

m

they aren't actually set up as delays but it's fairly easy to connect them up to multiple outs on a basic integer delay.

the stock 'interpolated delay' uses allpass interpolation. if you ...
by dentistguba
Thu May 01, 2014 6:44 pm
Forum: DSP
Topic: Audio buffer lookahead?
Replies: 3
Views: 16128

Audio buffer lookahead?

Hi,

been a while since I posted here but I've still been working on my physical modelling drum synth and have started to look into the possibility of internal triggering as an alternative option to just attempting to filter plain incoming audio sources, allowing more reliable results across varying ...